fix(proxy-wasm) pass VM config size to 'on_vm_start'

Fix #654

Co-Authored-By: dev-null-undefined <50732964+dev-null-undefined@users.noreply.github.com>

src/common/proxy_wasm/ngx_proxy_wasm.c

@@ -1213,7 +1213,8 @@ ngx_proxy_wasm_create_context(ngx_proxy_wasm_filter_t *filter,
             rc = ngx_wavm_instance_call_funcref(ictx->instance,
                                                 filter->proxy_on_vm_start,
                                                 &rets,
-                                                rexec->id, rexec->root_id);
+                                                rexec->id,
+                                                filter->module->config.len);
             if (rc != NGX_OK || !rets->data[0].of.i32) {
                 ecode = NGX_PROXY_WASM_ERR_VM_START_FAILED;
                 goto error;

t/03-proxy_wasm/001-on_root_phases.t

@@ -9,7 +9,7 @@ run_tests();
 
 __DATA__
 
-=== TEST 1: proxy_wasm - on_vm_start
+=== TEST 1: proxy_wasm - on_vm_start without configuration
 --- wasm_modules: on_phases
 --- config
     location /t {
@@ -25,7 +25,28 @@ qr/\[info\] .*? on_vm_start, config_size: 0/
 
 
 
-=== TEST 2: proxy_wasm - on_configure without configuration
+=== TEST 2: proxy_wasm - on_vm_start with configuration
+--- main_config eval
+qq{
+    wasm {
+        module on_phases $ENV{TEST_NGINX_CRATES_DIR}/on_phases.wasm 'foo=bar';
+    }
+}
+--- config
+    location /t {
+        proxy_wasm on_phases;
+        return 200;
+    }
+--- response_body
+--- error_log eval
+qr/\[info\] .*? on_vm_start, config_size: 7/
+--- no_error_log
+[error]
+[crit]
+
+
+
+=== TEST 3: proxy_wasm - on_configure without configuration
 --- wasm_modules: on_phases
 --- config
     location /t {
@@ -41,7 +62,7 @@ qr/\[info\] .*? on_configure, config_size: 0/
 
 
 
-=== TEST 3: proxy_wasm - on_configure with configuration
+=== TEST 4: proxy_wasm - on_configure with configuration
 --- wasm_modules: on_phases
 --- config
     location /t {